[gcov,v2,00/14] Add merge-stream subcommand to gcov-tool

  This patch set is for GCC 13.

The aim is to better support gcov in free-standing environments. For example,
you can run a test executable which dumps all gcov info objects in a serial
data stream using __gcov_info_to_gcda() and the new __gcov_filename_to_gcfn().
It could be encoded as base64. It could be also compressed. On the host you
unpack the encoded data stream and feed it into gcov-tool using the new
"merge-stream" subcommand:

gcov-tool --help
Usage: gcov-tool [OPTION]... SUB_COMMAND [OPTION]...

Offline tool to handle gcda counts

  -h, --help                            Print this help, then exit
  -v, --version                         Print version number, then exit
  merge-stream [options] [stream-file]  Merge coverage stream file (or stdin)
                                        and coverage file contents
    -v, --verbose                       Verbose mode
    -w, --weight <w1,w2>                Set weights (float point values)

Example:

base64 -d log.txt | gcov-tool merge-stream

The patch set does not change the format of .gcda files.

TODO:

* Tests for gcov-tool

v2:

* Address review comments from v1

* Simple test for __gcov_filename_to_gcfn()

* Use xstrerror()

* Add documentation

Sebastian Huber (14):
  gcov-tool: Allow merging of empty profile lists
  gcov: Add mode to all gcov_open()
  gcov: Add open mode parameter to gcov_do_dump()
  gcov: Make gcov_seek() static
  gcov: Add __gcov_filename_to_gcfn()
  gcov-tool: Support file input from stdin
  gcov: Use xstrdup()
  gcov: Move prepend to list to read_gcda_file()
  gcov: Move gcov_open() to caller of read_gcda_file()
  gcov: Fix integer types in ftw_read_file()
  gcov: Record EOF error during read
  gcov-tool: Add merge-stream subcommand
  gcov: Use xstrerror()
  gcov: Add section for freestanding environments

 gcc/doc/gcov-tool.texi                   |  36 +++
 gcc/doc/gcov.texi                        | 375 +++++++++++++++++++++++
 gcc/doc/invoke.texi                      |  31 +-
 gcc/gcov-io.cc                           |  79 +++--
 gcc/gcov-io.h                            |  35 ++-
 gcc/gcov-tool.cc                         | 107 +++++--
 gcc/testsuite/gcc.dg/gcov-info-to-gcda.c |  36 ++-
 libgcc/gcov.h                            |  17 +-
 libgcc/libgcov-driver-system.c           |   7 +-
 libgcc/libgcov-driver.c                  |  44 ++-
 libgcc/libgcov-util.c                    | 150 +++++++--
 libgcc/libgcov.h                         |   3 -
 12 files changed, 803 insertions(+), 117 deletions(-)
  

On 4/25/22 09:09, Sebastian Huber wrote:
> This patch set is for GCC 13.
> 
> The aim is to better support gcov in free-standing environments. For example,
> you can run a test executable which dumps all gcov info objects in a serial
> data stream using __gcov_info_to_gcda() and the new __gcov_filename_to_gcfn().
> It could be encoded as base64. It could be also compressed. On the host you
> unpack the encoded data stream and feed it into gcov-tool using the new
> "merge-stream" subcommand:
> 
> gcov-tool --help
> Usage: gcov-tool [OPTION]... SUB_COMMAND [OPTION]...
> 
> Offline tool to handle gcda counts
> 
>   -h, --help                            Print this help, then exit
>   -v, --version                         Print version number, then exit
>   merge-stream [options] [stream-file]  Merge coverage stream file (or stdin)
>                                         and coverage file contents
>     -v, --verbose                       Verbose mode
>     -w, --weight <w1,w2>                Set weights (float point values)
> 
> Example:
> 
> base64 -d log.txt | gcov-tool merge-stream
> 
> The patch set does not change the format of .gcda files.
> 
> TODO:
> 
> * Tests for gcov-tool
> 
> v2:
> 
> * Address review comments from v1
> 
> * Simple test for __gcov_filename_to_gcfn()
> 
> * Use xstrerror()
> 
> * Add documentation

Hi.

Thank you for it. Please install the patch set once Stage 1 opens.

Cheers,
Martin

> 
> Sebastian Huber (14):
>   gcov-tool: Allow merging of empty profile lists
>   gcov: Add mode to all gcov_open()
>   gcov: Add open mode parameter to gcov_do_dump()
>   gcov: Make gcov_seek() static
>   gcov: Add __gcov_filename_to_gcfn()
>   gcov-tool: Support file input from stdin
>   gcov: Use xstrdup()
>   gcov: Move prepend to list to read_gcda_file()
>   gcov: Move gcov_open() to caller of read_gcda_file()
>   gcov: Fix integer types in ftw_read_file()
>   gcov: Record EOF error during read
>   gcov-tool: Add merge-stream subcommand
>   gcov: Use xstrerror()
>   gcov: Add section for freestanding environments
> 
>  gcc/doc/gcov-tool.texi                   |  36 +++
>  gcc/doc/gcov.texi                        | 375 +++++++++++++++++++++++
>  gcc/doc/invoke.texi                      |  31 +-
>  gcc/gcov-io.cc                           |  79 +++--
>  gcc/gcov-io.h                            |  35 ++-
>  gcc/gcov-tool.cc                         | 107 +++++--
>  gcc/testsuite/gcc.dg/gcov-info-to-gcda.c |  36 ++-
>  libgcc/gcov.h                            |  17 +-
>  libgcc/libgcov-driver-system.c           |   7 +-
>  libgcc/libgcov-driver.c                  |  44 ++-
>  libgcc/libgcov-util.c                    | 150 +++++++--
>  libgcc/libgcov.h                         |   3 -
>  12 files changed, 803 insertions(+), 117 deletions(-)
>